RAM 2500 Truck 2WD L6-6.7L DSL Turbo (2010)
Headlamp Switch: Testing and Inspection
HEADLAMP SWITCH
WARNING: To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before
attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component
diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to
discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper
precautions could result in accidental airbag deployment.
1. Remove the headlamp switch from the instrument panel. See: Service and Repair/Headlamp Switch - Removal.
2. Disconnect the instrument panel wire harness connector from the back of the headlamp switch.
3. Using an ohmmeter, test the resistance or continuity between the terminals of the switch as shown in the Headlamp Switch Tests table.
4. If the switch fails any of the tests, replace the ineffective headlamp switch as required.
